UNIPRO – The original Laptimer
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Low battery warning
The Laptimer is constantly measuring the battery voltage and if the voltage drops too much, a
battery-warning icon is shown in the display. There are three different warning levels before the
Laptimer turns off:
Indication Battery
voltage What to do
Turned on
> 1.90 V
This is an early warning. Do not change the
batteries yet, but wait until the icon starts to
blink. Batteries are expensive and not good for
the environment. Please wait as long as possible.
Blinks
> 1.80 V
Now it is time to change the batteries. When the
icon starts to blink.
Display blinks
> 1.60 V
This is the last chance to change the batteries
without loosing any data.
RPM calculation
Different Laptimers have very different ways of calculating the RPM. The Unipro Laptimer use a
very advanced method. The result is very precise calculation of the RPM. A very simplified
explanation of the difference is that:
2
Some Laptimers counts each pulse to the spark plug, and calculates a new RPM value for
each 0.6 seconds – a total of 10 new RPM values per second.
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Unipro Laptimers use an advanced processor that measures the time between pulses to the
spark plug. This method results in up to 350 new RPM values per second.
2
Some Laptimers calculates the RPM without any kind of filter on the signal from the spark
plug. Since there is a lot of unwanted noise, this method is not very precise.
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Unipro Laptimers uses an advanced two-way filter technology, of our own invention, to
filter the signal from the spark plug. This method results in a very precise calculation.
